diff -Nur black-hole-solver-1.10.1/libblack-hole-solver.pc.in black-new/libblack-hole-solver.pc.in
--- black-hole-solver-1.10.1/libblack-hole-solver.pc.in	2019-12-27 16:06:01.000000000 +0100
+++ black-new/libblack-hole-solver.pc.in	2021-04-29 13:52:47.298340002 +0200
@@ -1,6 +1,6 @@
 prefix="@CMAKE_INSTALL_PREFIX@"
 exec_prefix=${prefix}
-libdir=${exec_prefix}/lib
+libdir=${exec_prefix}/@CMAKE_INSTALL_LIBDIR@
 includedir=${prefix}/include
 
 Name:  Black Hole Solitaire Solver